There is a bug in API that misreports the pool address. It contains some unknown chars. 0.8.7 was fine; for example:
\ufffd\ufffd\u0001\\\u0003\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000g:14444
Re-download 0.8.8 -> also there is a note on release page. Got it fixed.